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Journal of the Air & Waste Management Association

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https://www.readbyqxmd.com/read/29121482/feasibility-of-coupling-a-thermal-optical-carbon-analyzer-to-a-quadrupole-mass-spectrometer-for-enhanced-pm2-5-speciation
#1
Gustavo M Riggio, Judith C Chow, Paul M Cropper, Xiaoliang Wang, Reddy L N Yatavelli, Xufei Yang, John G Watson
A thermal/optical carbon analyzer (TOA), normally used for quantification of organic carbon (OC) and elemental carbon (EC) in PM2.5 speciation networks, was adapted to direct thermally-evolved gases to an electron impact quadrupole mass spectrometer (QMS), creating a TOA-QMS. This approach produces spectra similar to those obtained by the Aerodyne Aerosol Mass Spectrometer (AMS), but the ratios of the mass to charge (m/z) signals differ and must be re-measured using laboratory-generated standards. Linear relationships are found between TOA-QMS signals and ammonium (NH4(+)), nitrate (NO3(-)), and sulfate (SO4(2-)) standards...
November 9, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29121481/production-of-sludge-incorporated-paver-blocks-for-efficient-waste-management
#2
P Velumani, S Senthilkumar
Waste management plays a vital role in the reuse of industry wastes in to useful conversions. The treatment of effluents from the combined textile effluent treatment plant and hypo sludge from the paper industry results in sludge generation which poses a huge challenge for its disposal. Therefore, an eco friendly attempt is made to utilize them in the production of paver blocks. Paver blocks are a construction unit which imparts vast application in street roads, walking paths, fuel stations etc. In this study, an innovative attempt has been made to manufacture paver blocks incorporated with textile effluent treatment plant sludge and hypo sludge to utilize them with suitable proportions...
November 9, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29121478/statement-of-removal
#3
(no author information available yet)
No abstract text is available yet for this article.
November 9, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29120693/mesoscale-behavior-study-of-collector-aggregations-in-a-self-excited-wet-dust-scrubber
#4
Xiaochuan Li, Xiang Wu, Haibin Hu, Shuguang Jiang, Tao Wei, Dongxue Wang
In order to address the bottleneck problem of low fine-particle removal efficiency of self-excited dust scrubbers, this paper is focused on the influence of the intermittent gas-liquid two-phase flow on the mesoscale behavior of collector aggregations. The latter is investigated by the application of high-speed dynamic image technology to the self-excited dust scrubber experimental setup. The real-time-scale monitoring of the dust removal process is provided to clarify its operating mechanism at the mesoscale level...
November 9, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29035632/a-multi-objective-optimization-model-and-orthogonal-design-based-hybrid-heuristic-algorithm-for-regional-urban-mining-management-problems
#5
Hao Wu, Zhong Wan
In this paper, a multi-objective mixed-integer piecewise nonlinear programming model (MOMIPNLP) is built to formulate the management problem of urban mining system, where the decision variables are associated with buy-back pricing, choices of sites, transportation planning and adjustment of production capacity. Different from the existing approaches, the social negative effect, generated from structural optimization of the recycling system, is minimized in our model, as well as the total recycling profit and utility from environmental improvement are jointly maximized...
October 16, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29020572/variability-in-the-primary-emissions-and-secondary-gas-and-particle-formation-from-vehicles-using-bio-ethanol-mixtures
#6
E Gramsch, V Papapostolou, F Reyes, Y Vásquez, M Castillo, P Oyola, G López, A Cádiz, S Ferguson, M Wolfson, J Lawrence, P Koutrakis
Bioethanol for use in vehicles is becoming a substantial part of global energy infrastructure because it is renewable and some emissions are reduced. Carbon monoxide (CO) emissions and total hydrocarbons (THC) are reduced but there is still controversy regarding emissions of nitrogen oxides (NOx), aldehydes and ethanol, this may be a concern because all these compounds are precursors of ozone and secondary organic aerosol (SOA). The amount of emissions depends on the ethanol content, but also may depend on the engine quality and ethanol origin...
October 11, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29020513/application-of-an-integrated-wrf-calpuff-modeling-tool-for-source-apportionment-of-atmospheric-pollutants-for-air-quality-management-a-case-study-in-the-urban-area-of-benxi-china
#7
Hao Wu, Yan Zhang, Qi Yu, Weichun Ma
In this study, we endeavored to develop an effective framework for improving local urban air quality on meso-micro scales in cities in China that are experiencing rapid urbanization. Within this framework, the integrated WRF/CALPUFF modeling system was applied to simulate the concentration distributions of typical pollutants (PM10, SO2 and NOx) in the urban area of Benxi. Statistical analyses were performed to verify the credibility of this simulation, including the meteorological fields and concentration fields...
October 11, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28945514/influence-of-biowastes-compost-amendment-on-soil-organic-carbon-storage-under-arid-climate
#8
Ali Mekki, Fathi Aloui, Sami Sayadi
Organic matter amendments have been proposed as a means to enhance soil carbon stocks on degraded soils particularly under arid climate. Soil organic carbon (SOC) plays a critical role in terrestrial carbon cycling and is central to preserving soil quality. The effects of biowastes compost (BWC) on soil carbon storage were investigated. Besides, changes in soil organic matter (SOM) and even soil organic carbon (SOC) in BWC amended soils following different applications were studied. The added BWC quantities were as followed: BWC/Soil (weight/weight (w/w) respectively: 1/8, 1/4 and 1/2)...
September 25, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28945513/assimilative-capacity-based-emission-load-management-in-a-critically-polluted-industrial-cluster
#9
Smaranika Panda, S M Shiva Nagendra
In the present study, a modified approach was adopted to quantify the assimilative capacity (i.e., the maximum emission an area can take without violating the permissible pollutant standards) of a major industrial cluster (Manali, India) and to assess the effectiveness of adopted air pollution control measures at the region. Seasonal analysis of assimilative capacity was carried out corresponding to critical, high, medium, and low pollution levels to know the best and worst conditions for industrial operations...
September 25, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28945508/alternate-approaches-for-assessing-impacts-of-oil-sands-development-on-air-quality-a-case-study-using-the-first-nation-community-of-fort-mckay
#10
Carla Davidson, David Spink
Previous analyses of continuously measured compounds in Fort McKay, an indigenous community in the Athabasca Oil Sands, have detected increasing concentrations of NO2 and total hydrocarbons (THC), but not of SO2, O3, total reduced sulfur compounds (TRS) or particulate matter (PM2.5). Yet the community frequently experiences odours, dust, and reduced air quality. We used Fort McKay's continuously monitored air quality data (1998-2014) as a case study to assess techniques for air quality analysis that make no assumptions regarding type of change...
September 25, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28837409/use-of-a-gc-ms-organic-aerosol-monitor-for-in-field-detection-of-fine-particulate-organic-compounds-in-source-apportionment
#11
Paul M Cropper, Delbert J Eatough, Devon K Overson, Jaron C Hansen, Fern Caka, Robert A Cary
A study was conducted on the Brigham Young University campus during January and February 2015 to identify winter-time sources of fine particulate material in Utah Valley, Utah. Fine particulate mass and components and related gas phase species were all measured on an hourly average basis. Light scattering was also measured during the study. Included in the sampling was the first-time source apportionment application of a new monitoring instrument for the measurement of fine particulate organic marker compounds on an hourly average basis...
August 24, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28837396/research-and-proposal-on-scr-reactor-optimization-for-industrial-boiler
#12
Yiming Yang, Jian Li, Hong He
The advanced CFD software STAR-CCM+ was used to simulate a denitrification (De-NOx) project for a boiler in this paper, and the simulation result was verified based on a physical model. Two SCR reactors were developed: reactor #1 was optimized and #2 was developed based on #1. Various indicators including gas flow field, ammonia concentration distribution, temperature distribution, gas incident angle and system pressure drop were analyzed. The analysis indicated Reactor #2 was of outstanding performance and could simplify developing greatly...
August 24, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29028428/introduction-to-a-special-grouping-of-papers-from-the-2016-air-quality-measurement-methods-and-technology-conference
#13
Prakash Doraiswamy
No abstract text is available yet for this article.
November 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29028427/air-quality-measurements-from-rubber-bands-to-tapping-the-rainbow
#14
Michael T Kleinman, Sara J Head, Eric D Stevenson, John G Watson, Judith C Chow, George M Hidy, Samuel L Altshuler, Peter K Mueller
No abstract text is available yet for this article.
November 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28718709/bioaerosols-concentrations-in-working-areas-in-biomethanization-facilities
#15
Marie-Eve Dubuis, Hamza M'Bareche, Marc Veillette, Bouchra Bakhiyi, Joseph Zayed, Jacques Lavoie, Caroline Duchaine
This study sought to fill the gap in information about the type and the concentration of bioaerosols present in the air of biomethanization facilities (BF). Evaluation of bioaerosol composition and concentration was achieved in two biomethanization facilities located in Eastern Canada, during summer and winter. In order to have a thorough understanding of the studied environment, the methodology combined culture of bacteria and molds, qualitiative polymerase chain reaction (qPCR) for specific microorganisms, endotoxin quantification, and next-generation sequencing (NGS) for bacterial diversity...
November 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28633004/field-evaluations-of-newly-available-interference-free-monitors-for-nitrogen-dioxide-and-ozone-at-near-road-and-conventional-national-ambient-air-quality-standards-compliance-sites
#16
Alan R Leston, Will M Ollison
Long-standing measurement techniques for determining ground-level ozone (O3) and nitrogen dioxide (NO2) are known to be biased by interfering compounds that result in overestimates of high O3 and NO2 ambient concentrations under conducive conditions. An increasing near-ground O3 gradient (NGOG) with increasing height above ground level is also known to exist. Both the interference bias and NGOG were investigated by comparing data from a conventional Federal Equivalent Method (FEM) O3 photometer and an identical monitor upgraded with an "interference-free" nitric oxide O3 scrubber that alternatively sampled at 2 m and 6...
November 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28541795/near-roadway-monitoring-of-vehicle-emissions-as-a-function-of-mode-of-operation-for-light-duty-vehicles
#17
Dongqi Wen, Wenjuan Zhai, Sheng Xiang, Zhice Hu, Tongchuan Wei, Kenneth E Noll
Determination of the effect of vehicle emissions on air quality near roadways is important because vehicles are a major source of air pollution. A near-roadway monitoring program was undertaken in Chicago between August 4 and October 30, 2014, to measure ultrafine particles, carbon dioxide, carbon monoxide, traffic volume and speed, and wind direction and speed. The objective of this study was to develop a method to relate short-term changes in traffic mode of operation to air quality near roadways using data averaged over 5-min intervals to provide a better understanding of the processes controlling air pollution concentrations near roadways...
November 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28453402/evaluation-of-carbon-emission-reductions-promoted-by-private-driving-restrictions-based-on-automatic-fare-collection-data-in-beijing-china
#18
Wandi Zhang, Feng Chen, Zijia Wang, Jianling Huang, Bo Wang
Public transportation automatic fare collection (AFC) systems are able to continuously record large amounts of passenger travel information, providing massive, low-cost data for research on regulations pertaining to public transport. These data can be used not only to analyze characteristics of passengers' trips but also to evaluate transport policies that promote a travel mode shift and emission reduction. In this study, models combining card, survey, and geographic information systems (GIS) data are established with a research focus on the private driving restriction policies being implemented in an ever-increasing number of cities...
November 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28379117/an-evaluation-of-mass-absorption-cross-section-for-optical-carbon-analysis-on-teflon-filter-media
#19
Paige Presler-Jur, Prakash Doraiswamy, Okisha Hammond, Joann Rice
Black carbon (BC) or elemental carbon (EC) is a by-product of incomplete fuel combustion, and contributes adversely to human health, visibility, and climate impacts. Previous studies have examined nondestructive techniques for particle light attenuation measurements on Teflon® filters to estimate BC. The incorporation of an inline Magee Scientific OT21 transmissometer into the MTL AH-225 robotic weighing system provides the opportunity to perform optical transmission measurements on Teflon filters at the same time as the gravimetric mass measurement...
November 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28152339/autonomous-mobile-platform-for-monitoring-air-emissions-from-industrial-and-municipal-wastewater-ponds
#20
Long Fu, Quamrul Huda, Zheng Yang, Lucas Zhang, Zaher Hashisho
Significant amounts of volatile organic compounds and greenhouse gases are generated from wastewater lagoons and tailings ponds in Alberta, Canada. Accurate measurements of these air pollutants and greenhouse gases are needed to support management and regulatory decisions. A mobile platform was developed to measure air emissions from tailings pond in the oil sands region of Alberta. The mobile platform was tested in 2015 in a municipal wastewater treatment lagoon. With a flux chamber and a CO2/CH4 sensor on board, the mobile platform was able to measure CO2 and CH4 emissions over two days at two different locations in the pond...
November 2017: Journal of the Air & Waste Management Association
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